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All Journal Media Mesin: Majalah Teknik Mesin Jurnal Teknik Mesin Indonesia Journal of Applied Sciences and Advanced Technology JMES: The International Journal of Mechanical Engineering and Sciences Journal of Community Services: Sustainability and Empowerment Jurnal Polimesin ASEAN Journal for Science and Engineering in Materials
Nikolas Krisma Hadi Fernandez
Department Of Mechanical Engineering, Faculty Of Engineering And Technology, Sampoerna University, Jakarta, 12780, Indonesia
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Desain struktur alat pengangkat peti jenazah COVID-19 dengan mekanisme gantry crane Nikolas Krisma Hadi Fernandez; Amelia Nuraisyah Quinsi Jemy; Bilqist Imeilia Az Zahra; Musafri Yetti; Farid Triawan
Jurnal Teknik Mesin Indonesia Vol 16 No 2 (2021): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v16i2.235

Abstract

Jumlah kasus COVID-19 masih terus meningkat, dengan angka penambahan kematian yang juga belum dapat benar-benar diredam. Dengan protokol kesehatan yang harus diikuti, kadang pekerja kesehatan kesusahan untuk menguburkan jenazah korban COVID-19. Penelitian ini mencoba membantu dengan mendesain dan menganalisis perangkat yang dapat membantu pekerja kesehatan untuk menguburkan jenazah dengan menggunakan mekanisme gantry crane. Perangkat ini didesain untuk mengangkat beban hingga 200 kg. Perangkat ini memiliki keunikan, yaitu dapat dilipat dan dibongkar pasang, agar memudahkan dalam menyimpan dan memasang perangkat. Hasil analisis teoretikal terhadap faktor keamanan pada beban statis dan dinamis (beban lelah) menggunakan teori Modified Goodman masing-masing menunjukkan angka 1.45 dan 1.82 pada bagian paling kritis yang berarti produk ini aman dan diprediksi memiliki umur tak hingga. Penelitian ini diharapkan dapat menjadi referensi dalam penciptaan produk pembantu penguburan yang lebih baik.
TEKNOLOGI SEPARATOR PADA BATERAI LI-ION: MATERIAL, TEKNIK FABRIKASI, DAN UJI PERFORMA Nikolas Krisma Hadi Fernandez; Farid Triawan
Media Mesin: Majalah Teknik Mesin Vol 24, No 1 (2023)
Publisher : Program Studi Teknik Mesin, Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v24i1.20029

Abstract

The trend of using electric vehicles is increasing. With the increasing use of electric vehicles, it is necessary to master the key technologies used by electric vehicles, one of which is batteries, especially lithium-ion batteries (LiB). There are many important components in the LiB, one of which is a separator that serves to block short circuits between the anode and cathode of the battery while providing a way for ion exchange to continue. This article summarizes important information related to battery separator technology. The information includes the materials that have been used in commercial products and those of under research and development. In addition, the method of fabricating the separator using conventional methods and 3D printing is discussed. Finally, this article also discusses how several studies perform performance tests on separator materials. Keywords: battery separator, fabrication, materials, performance test, lithium-ion battery.
Academic Motivations in Junior High School Refreshing Day Djajasoepena, Rafie; Setiawan, Iwan; Triawan, Farid; Redi, Anak Agung Ngurah Perwira; Fernandez, Nikolas Krisma Hadi; Prasetyo, Ilham; Alibasa, Muhammad Johan; Wandy, Wandy
Journal of Community Services: Sustainability and Empowerment Vol. 4 No. 01 (2024): March 2024
Publisher : Center for Research and Community Service of Sampoerna University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35806/jcsse.v4i1.448

Abstract

Motivation is a crucial factor in education as it stimulates, guides, and channels purposeful behavior driven by biological, emotional, social, and cognitive factors. Motivation can be a key element of a student’s achievement. This study explores the role of motivation in academic achievement and describes a community service program undertaken at SMP Negeri 174 Jakarta.. This initiative aims to motivate students before their final exams by sharing success stories of effective study habits and providing tips for exam preparation. The community service activities commenced in late March 2024 and concluded in May 2024. Over 200 participants, consisting of year-9 students, took part in the event, which began in the morning and lasted for two hours, ending before noon. The majority of the resource persons and the organizers were actively involved in the event preparations. The success of this initiative suggests the potential of similar programs to motivate students in the future.
Machine fault detection through sound analysis using MFCC and machine learning Chang, Steven Henderson; Purnomo, Ariana Tulus; Bhakti, Muhammad Agni Catur; Mulia, Vania Katherine; Rizky, Agyl Fajar; Fernandez, Nikolas Krisma Hadi; Triawan, Farid
Jurnal Polimesin Vol 23, No 3 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i3.6653

Abstract

This study addresses the need for automated damage and failure detection in industrial machinery through sound analysis and machine learning. Traditional methods rely on human experts to identify faults using microphones, which can be time-consuming, stressful, and prone to errors such as limited perception, subjectivity, and inconsistency. This study leverages machine learning to create a more objective and efficient alternative. Mel-Frequency Cepstral Coefficients (MFCCs) were employed for feature extraction, capturing intricate sound patterns associated with machinery faults. Through rigorous experimentation, 11 MFCC coefficients were identified as optimal. The Support Vector Machine (SVM) emerged as the best-performing classifier compared to LightGBM and XGBoost, achieving a training accuracy of 83.12% and testing accuracy of 82.50%. The dataset was split between 80% for training and 20% for testing. The small gap between training and testing accuracy indicates an ideal model with no signs of over fitting, under fitting, or data leakage. Real-world simulations validated the model’s efficacy under various operational scenarios, demonstrating its readiness for industrial deployment. This study highlights the effectiveness of sound analysis and SVM classification in proactive maintenance, offering a reliable tool to reduce downtime and maintenance costs while enhancing operational efficiency and reliability.
A quad-cliff mechanism for eco-printing by pounding technique: design, manufacturing, and testing Triawan, Farid; Dyota, Arya Smara; Kamila, Fatima Tasya; Saptaji, Kushendarsyah; Fernandez, Nikolas Krisma Hadi; Silitonga, Arridina Susan; Sebayang, Abdi Hanra
Jurnal Polimesin Vol 22, No 5 (2024): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i5.5738

Abstract

Indonesia produces many types of textile products, such as clothing and custom fabrics often with unique patterns. To generate the patterns, there are many methods, including eco-printing by pounding process. However, the process, which was later referred to as eco-pounding, requires much time and energy, which can have a negative impact, such as musculoskeletal disorders, on the human body. To address this issue, the present work proposes a machine that can help the process of eco-pounding. Shigley’s method is applied to guide the design process of the machine. The design and manufacturing processes of the eco-pounding machine are presented, in which three machine design models are first introduced and then analyzed for finalization by benchmarking method. Subsequently, a machine model that uses a so-called quad-cliff mechanism is selected for manufacturing and testing. As a result, the proposed machine can achieve the design requirements that were set. Three pounding movements per second can be obtained by the machine, with possible increases by an engine upgrade. This machine can be considered a prototype for a semi-automatic eco-printing process by pounding technique.
Design, Fabrication, and Testing of a Sensor-Driven Table Tennis Trainer with Real-Time Feedback Stivan Delon Sahertian; Fahriza Fadhila; Johan Kim; Jonathan Bryan; Samuel Theodore Gunawan; Hans Sebastian; Nikolas Krisma Hadi Fernandez; Farid Triawan
JMES: The International Journal of Mechanical Engineering and Sciences Vol 10 No 1 (2026)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25807471.v10i1.23464

Abstract

This paper presents the design, fabrication, and testing of a sensor-driven training device for table tennis that provides real-time feedback. To identify ball trajectory and validate shots, the device uses infrared and sound sensors in combination with ESP32 microcontrollers in a master-slave arrangement. A goal-like structure attached to the table collects balls, while sensors assess whether a shot is valid, which is defined as a ball that bounces on the table before entering the goal. Visual feedback is provided via LED strips and an LCD display, guaranteeing that players receive immediate and intuitive performance information. Testing was done under three different conditions: infrared sensor only, infrared plus sound sensor in a quiet area, and infrared plus sound sensor in a noisy environment. The results demonstrated that, while a single infrared sensor reliably identified ball entry, it could not distinguishbetween valid and invalid shots. Combining infrared and sound sensors yielded complete accuracy in calm situations but dropped to 40% accuracy in noisy environments due to sound interference. The study addresses the lack of affordable, real-time training feedback systems for table tennis by proposing multi-sensor systems capable of distinguishing valid and invalid shots based on the contact between the ball and the table. This paper reports a validation of the proof-of-concept of a low-cost multi-sensor system, which focuses on the system’s accuracy instead of comparison of human performance.
Fabrication of Synthetic Lumbar Vertebrae by a Combination of FDM 3D-Printing and PU Foam Casting from Two Injection Techniques for Surgical Training Farid Triawan; Nisa Khoiriyah; A. Asriyanti; Muhammad Satrio Utomo; Kushendarsyah Saptaji; Nikolas Krisma Hadi Fernandez; Muhammad Akhsin Muflikhun
ASEAN Journal for Science and Engineering in Materials Vol 5, No 1 (2026): AJSEM: Volume 5, Issue 1, March 2026
Publisher : Bumi Publikasi Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to introduce a rapid and precise fabrication technique of lumbar vertebrae model that mimics the cortical and cancellous parts of the bone using polylactic acid (PLA) and polyurethane (PU) foam, respectively. An FDM 3D-printing using PLA filament was utilized to fabricate the cortical part, then PU foam was molded into the printed cortical to form the cancellous part. The fabricated model was examined by comparing its dimensions with the stereolithography (STL) model. Sequentially, density measurement, compressive test, and microstructure observation were performed to evaluate the specimen characteristics. The results showed that the dimensions of the vertebrae model agreed well with the STL model, with a discrepancy of less than 4%. The fabricated PU samples exhibited a density in the range of 476–557 kg/m³, elastic moduli of 3.99–7.17 MPa, and a pore size of 136.66–179.80 µm, which are lower than the properties of human bone. Despite that, the PU samples maintain their compressive strength of 0.329–0.589 MPa, which is within the range of cancellous human bone.
Nickel Electroplating on 3D Printed Polylactic Acid (PLA) for Hardness Enhancement Ramses Maur Ragaventrand; Kushendarsyah Saptaji; Iwan Setiawan; Murni Handayani; Nikolas Krisma Hadi Fernandez
Journal of Applied Sciences and Advanced Technology Vol. 8 No. 2 (2025): Journal of Applied Science and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.8.2.27-34

Abstract

Electroplating is a process that uses electric current to deposit a layer of metal onto the surface of a conductive material, enhancing its properties such as corrosion resistance, electrical conductivity, and mechanical strength. This study investigates the process of nickel electroplating on 3D-printed polylactic acid (PLA) substrates, focusing on the efficiency and quality of the nickel coatings achieved through electroplating techniques. The methodology encompasses several stages, starting with the design and 3D printing of PLA specimens. Following this, the preparation of the electroplating setup is meticulously carried out, ensuring optimal conditions for the electroplating process. The quality of the nickel coating is then evaluated through a series of tests to assess its mechanical and electrical properties. The key findings from this research indicate that the electroplating process effectively deposits nickel onto the PLA substrates. This deposition significantly enhances the mechanical strength and electrical conductivity of the PLA specimens. The study's results suggest that nickel electroplating on PLA can be a viable method for improving the material properties of 3D-printed parts. This advancement not only contributes to the development of cost-effective and sustainable metal coating techniques for polymer-based materials but also has the potential to broaden the application scope of 3D-printed parts in various fields of engineering and technology. Such improvements could be particularly beneficial in industries requiring enhanced material performance, such as electronics, automotive, and aerospace sectors.
Co-Authors A. Asriyanti Abdi Hanra Sebayang Amelia Nuraisyah Quinsi Jemy Anak Agung Ngurah Perwira Redi Ariana Tulus Purnomo Arridina Susan Silitonga - Bilqist Imeilia Az Zahra Chang, Steven Henderson Dyota, Arya Smara Fahriza Fadhila Farid Triawan Hans Sebastian Ilham Prasetyo Iwan Setiawan Iwan Setiawan Johan Kim Jonathan Bryan Kamila, Fatima Tasya Kushendarsyah Saptaji Kushendarsyah Saptaji Muhammad Agni Catur Bhakti Muhammad Akhsin Muflikhun Muhammad Johan Alibasa Muhammad Satrio Utomo Mulia, Vania Katherine Murni Handayani Musafri Yetti Nisa Khoiriyah Rafie Djajasoepena Ramses Maur Ragaventrand Rizky, Agyl Fajar Samuel Theodore Gunawan Stivan Delon Sahertian Triawan, Farid Wandy Wandy